Claus Kiefer
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German physicist
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Physics
Claus Kiefer's Degrees
- PhD Physics University of Cologne
Why Is Claus Kiefer Influential?
(Suggest an Edit or Addition)Claus Kiefer's Published Works
Number of citations in a given year to any of this author's works
Total number of citations to an author for the works they published in a given year. This highlights publication of the most important work(s) by the author
Published Works
- Quantum Measurement and Control (2010) (1106)
- Modern Canonical Quantum General Relativity (2008) (927)
- Quantum Gravity (2004) (495)
- Asymptotic freedom in inflationary cosmology with a non-minimally coupled Higgs field (2009) (276)
- Quantum Gravity (Cambridge Monographs on Mathematical Physics) (2005) (231)
- Higgs boson, renormalization group, and naturalness in cosmology (2009) (193)
- QUANTUM-TO-CLASSICAL TRANSITION FOR FLUCTUATIONS IN THE EARLY UNIVERSE (1998) (172)
- Why do cosmological perturbations look classical to us (2008) (158)
- Continuous measurement of mini-superspace variables by higher multipoles (1987) (155)
- Decoherence: Theoretical, Experimental, and Conceptual Problems (2000) (142)
- Pointer states for primordial fluctuations in inflationary cosmology (2006) (128)
- Quantum gravity : from theory to experimental search (2003) (122)
- Quantum gravity: general introduction and recent developments (2005) (112)
- Quantum phantom cosmology (2006) (109)
- The semiclassical approximation to quantum gravity (1993) (97)
- Conceptual Problems in Quantum Gravity and Quantum Cosmology (2013) (87)
- Quantum gravitational contributions to the cosmic microwave background anisotropy spectrum. (2011) (86)
- The Milky Way’s Supermassive Black Hole: How Good a Case Is It? (2017) (81)
- Black Holes: Theory and Observation (1998) (80)
- Quantum cosmology with a big-brake singularity (2007) (71)
- On the interaction of mesoscopic quantum systems with gravity (2004) (70)
- Entropy of gravitons produced in the early universe (1999) (69)
- Measurement Analysis and Quantum Gravity (2008) (64)
- Emergence of classicality for primordial fluctuations: Concepts and analogies (1998) (64)
- Can primordial black holes be a significant part of dark matter (2002) (64)
- Quantum fate of singularities in a dark-energy dominated universe (2009) (58)
- SINGULARITY AVOIDANCE BY COLLAPSING SHELLS IN QUANTUM GRAVITY (2001) (55)
- Accurate results for primordial black holes from spectra with a distinguished scale (2002) (52)
- Primordial black holes from inflationary models with and without broken scale invariance (2001) (48)
- Wave Packets in Quantum Cosmology and the Cosmological Constant (1990) (47)
- Decoherence: Concepts and examples (1998) (45)
- Does time exist in quantum gravity (2009) (45)
- Quantum-gravitational effects on gauge-invariant scalar and tensor perturbations during inflation: The slow-roll approximation (2016) (43)
- DECOHERENCE IN QUANTUM COSMOLOGY AT THE ONSET OF INFLATION (1998) (43)
- Tunneling cosmological state revisited: Origin of inflation with a nonminimally coupled standard model Higgs inflaton (2009) (42)
- On the modification of the cosmic microwave background anisotropy spectrum from canonical quantum gravity (2013) (41)
- Quantum geometrodynamics: whence, whither? (2008) (40)
- Conceptual Issues in Quantum Cosmology (1999) (40)
- LETTER TO THE EDITOR: The coherence of primordial fluctuations produced during inflation (1998) (40)
- Hawking radiation from decoherence (2001) (38)
- Wheeler-DeWitt equation and Feynman diagrams (1997) (38)
- Semiclassical approximation to supersymmetric quantum gravity (2005) (37)
- Quantum-gravitational effects on gauge-invariant scalar and tensor perturbations during inflation: The de Sitter case (2015) (37)
- Functional Schrödinger-Equation for Fermions in External Gauge Fields (1993) (36)
- Classical and quantum LTB model for the non-marginal case (2005) (33)
- 49 67 v 3 [ gr-q c ] 2 5 O ct 2 01 1 Quantum Gravitational Contributions to the CMB Anisotropy Spectrum (2011) (32)
- Hamiltonian evolution and quantization for extremal black holes (1998) (31)
- Non-minimally coupled scalar fields and the initial value problem in quantum gravity (1989) (31)
- Scalar and vector perturbations in a universe with discrete and continuous matter sources (2016) (28)
- Exact positivity of the Wigner and P-functions of a Markovian open system (2001) (28)
- Can the Arrow of Time Be Understood from Quantum Cosmology (2009) (27)
- Embedding variables in the canonical theory of gravitating shells (2000) (27)
- Higgs boson, renormalization group, and cosmology (2009) (27)
- Origin of classical structure from inflation (2000) (26)
- CAN EFFECTS OF QUANTUM GRAVITY BE OBSERVED IN THE COSMIC MICROWAVE BACKGROUND (2012) (26)
- On the Interpretation of Quantum Theory — from Copenhagen to the Present Day (2002) (25)
- Time in Quantum Gravity (2011) (24)
- Continuous measurement of intrinsic time by fermions (1989) (24)
- Quantum Gravity — A Short Overview (2006) (23)
- Singularity avoidance for collapsing quantum dust in the Lemaître-Tolman-Bondi model (2019) (23)
- Why Quantum Gravity (2007) (22)
- Boundary conditions in quantum string cosmology (1997) (22)
- Indefinite oscillators and black‐hole evaporation (2008) (22)
- Classical and quantum cosmology of the little rip abrupt event (2016) (22)
- Resolution of type IV singularities in quantum cosmology (2013) (22)
- Semiclassical black hole states and entropy (1996) (21)
- Cosmic screening of the gravitational interaction (2017) (21)
- On the meaning of path integrals in quantum cosmology (1991) (21)
- Semiclassical approximation of the Wheeler–DeWitt equation: arbitrary orders and the question of unitarity (2018) (21)
- Quantum gravitational correction to the Hawking temperature from the Lemaître-Tolman-Bondi model (2010) (20)
- Cosmological constant from decoherence (2010) (20)
- The Canonical approach to quantum gravity: General ideas and geometrodynamics (2006) (20)
- Singularity avoidance in Bianchi I quantum cosmology (2019) (20)
- On the dynamics of the general Bianchi IX spacetime near the singularity (2018) (20)
- Effective action and decoherence by fermions in quantum cosmology (1999) (19)
- Can singularities be avoided in quantum cosmology? (2010) (18)
- A comparison between semiclassical gravity and semiclassical electrodynamics (1991) (18)
- Hawking radiation from the quantum Lemaitre-Tolman-Bondi model (2007) (17)
- Mass spectrum and statistical entropy of the BTZ black hole from canonical quantum gravity (2007) (15)
- Phantom singularities and their quantum fate: general relativity and beyond—a CANTATA COST action topic (2019) (15)
- Nonlocal braneworld action: An alternative to the Kaluza-Klein description (2002) (14)
- Quantum general relativity and Hawking radiation (2002) (14)
- On the avoidance of classical singularities in quantum cosmology (2010) (14)
- Quantum GravityThird Edition (2012) (14)
- Gibbs’ paradox and black-hole entropy (2007) (14)
- Quantum cosmology: expectations and results (2006) (13)
- Conformal and Weyl-Einstein gravity: Classical geometrodynamics (2017) (13)
- Quantum gravitational collapse and Hawking radiation in 2 + 1 dimensions (2007) (13)
- Quantum cosmology and the arrow of time (2005) (12)
- Scalar perturbations in cosmological models with dark energy-dark matter interaction (2015) (12)
- QUANTUM GRAVITY AND NON-UNITARITY IN BLACK HOLE EVAPORATION (1993) (12)
- Quantum Cosmology and the Emergence of a Classical World (1993) (12)
- Thermal and nonthermal scaling of the Casimir-Polder interaction in a black hole spacetime (2017) (11)
- Thermodynamics of black holes and Hawking radiation (1999) (11)
- Quantum-gravity effects for excited states of inflationary perturbations (2019) (10)
- Origin of classical structure in the Universe (2007) (10)
- Interpretation of the decoherence functional in quantum cosmology (1991) (10)
- Does Time Exist at the Most Fundamental Level (1997) (10)
- Consistent Histories and Decoherence (2003) (10)
- Quantum cosmological consistency condition for inflation (2014) (9)
- Interpretation of the triad orientations in loop quantum cosmology (2012) (9)
- Effective action and heat kernel in a toy model of brane-induced gravity (2007) (9)
- Quantum cosmology for the 21st century: A debate (2010) (9)
- Quantum gravitational collapse in the Lemaitre–Tolman–Bondi model with a positive cosmological constant (2009) (9)
- Emergence of a classical Universe from quantum gravity and cosmology (2012) (9)
- Quantum gravity: general introduction and recent developments (2005) (8)
- Hawking temperature from quasi-normal modes (2004) (8)
- Is there an information loss problem for black holes (2003) (8)
- Black holes : theory and observation : proceedings of the 179th W.E. Heraeus Seminar, held at Bad Honnef, Germany, 18-22 August 1997 (1998) (8)
- Graviton oscillations in the two-brane world (2002) (8)
- How does quantum gravity modify the Schrodinger equation for matter fields (1992) (8)
- On time and the quantum-to-classical transition in Jordan-Brans-Dicke quantum gravity (1993) (8)
- Semiclassical Gravity and the Problem of Time (1994) (8)
- Classical and quantum cosmology of Born-Infeld type models (2016) (7)
- EHRENFEST'S PRINCIPLE AND THE PROBLEM OF TIME IN QUANTUM GRAVITY (1996) (7)
- ORIGIN OF THE INFLATIONARY UNIVERSE (1999) (7)
- Braneworld effective action: An alternative to Kaluza-Klein reduction (2002) (7)
- Power spectrum for perturbations in an inflationary model for a closed universe (2021) (6)
- Quantum Gravity: Whence, Whither? (2012) (6)
- The Higgs field as an inflaton (2012) (6)
- Space, Time, Matter in Quantum Gravity (2020) (6)
- Decoherence in Quantum Field Theory and Quantum Gravity (2003) (6)
- Quantum gravity and Brownian motion (1989) (5)
- Emergence of classicality for primordial fluctuations: Concepts and analogies (1998) (5)
- Quantum geometrodynamics of Einstein and conformal (Weyl-squared) gravity (2017) (5)
- Comparison of the DeWitt metric in general relativity with the fourth-rank constitutive tensors in electrodynamics and in elasticity theory (2017) (5)
- Quantum gravitational effects in de Sitter space (1995) (5)
- Concept of time in canonical quantum gravity and string theory (2009) (5)
- Quantum Gravity — A General Introduction (2003) (5)
- Irreversibility in quantum field theory (1995) (5)
- Quantum black hole without singularity (2015) (5)
- Decoherence in Situations Involving the Gravitational Field (2000) (5)
- Can Quantum Theory be Applied to the Universe as a Whole? (2010) (4)
- Quantum Cosmology for the XXI st Century: A Debate (2012) (4)
- Quantum Gravity and Fundamental Constants (2004) (4)
- Entropy of gravitational waves and primordial fluctuations (2001) (4)
- The semiclassical approximation to quantum gravity and its observational consequences (2013) (4)
- Notes on Semiclassical Weyl Gravity (2016) (4)
- Gibbons, G.W., Shellard, E.P.S., Rankin, S.J. (eds.): The future of theoretical physics and cosmology. Celebrating Stephen Hawking–s 60th Birthday (2006) (3)
- Quantum Gravity (General) and Applications (2009) (3)
- On the Observability of Quantum-Gravitational Effects in the Cosmic Microwave Background (2014) (3)
- On a quantum Weyl curvature hypothesis (2021) (3)
- Symmetric wormholes in Einstein-vector–Gauss–Bonnet theory (2022) (3)
- Singularity avoidance in anisotropic quantum cosmology (2019) (3)
- Towards a Full Quantum Theory of Black Holes (1998) (3)
- Will LIGO see RIGO's? - Radion-induced graviton oscillations in the two-brane world (2002) (2)
- Decoherence in quantum cosmology (1991) (2)
- Aspects of Quantum Black Holes (2020) (2)
- 8th International Workshop DICE2016: Spacetime - Matter - Quantum Mechanics (2015) (2)
- Decoherence in Quantum Field Theory (1996) (2)
- T. Padmanabhan: Gravitation, Foundations and frontiers (2011) (2)
- Can we understand the arrow of time (2010) (2)
- Canonical quantum gravity and black-hole evaporation (2008) (2)
- One Hundred Years of Gauge Theory (2020) (2)
- Answer to Question #60. Interference of two independent sources (1998) (2)
- Semiclassical supersymmetric quantum gravity (2008) (1)
- Quantum cosmology (2008) (1)
- Path integrals and wormholes in quantum gravity (1993) (1)
- What can quantum cosmology say about the inflationary universe? (2015) (1)
- Defrosting the Big Freeze quantum mechanically (2010) (1)
- Plebański-Demiański solution of general relativity and its expressions quadratic and cubic in curvature: analogies to electromagnetism (2015) (1)
- Semiclassical quantum states for black holes (1997) (1)
- Can singularities be avoided in quantum cosmology? (2010) (1)
- Albert Einstein, Boris Podolsky, Nathan Rosen (2022) (1)
- Phase transitions, massive gravitons and effective action in braneworld theory (2002) (1)
- Advisory Board (2016) (1)
- On the construction of theU-matrix from Dirac brackets (1984) (1)
- Quantum aspects of black holes (2002) (1)
- Advisory Board (2016) (0)
- Advisory Board (2016) (0)
- Advisory Board (2017) (0)
- Indefinite oscillators and black‐hole evaporation (2009) (0)
- Advisory Board (2015) (0)
- Advisory Board (2017) (0)
- Advisory Board (2017) (0)
- Advisory Board (2013) (0)
- Does the quantum mechanical wave function exist (2019) (0)
- A pr 2 00 8 Quantum Cosmology (2008) (0)
- Inflation & Quantum mechanics (2014) (0)
- Advisory Board (2016) (0)
- Ju n 20 04 HAWKING TEMPERATURE FROM QUASI-NORMAL MODES (2004) (0)
- quant-ph/9501004 IRREVERSIBILITY IN QUANTUM FIELD THEORY 1 (1995) (0)
- On the Concept of Law in Physics (2013) (0)
- On Probabilities in the Many Worlds Interpretation of Quantum Mechanics † U niversity of C ologne (2016) (0)
- From classical to quantum Oppenheimer-Snyder model: non-marginal case (2023) (0)
- Advisory Board (2017) (0)
- Path Integrals in Quantum Cosmology (2001) (0)
- Advisory Board (2013) (0)
- Quantum Gravity With Connections And Loops (2007) (0)
- Advisory Board (2014) (0)
- Chapter 1 Quantum aspects of black holes (0)
- Buchbesprechung: Quantum Mechanics by J. Schwinger (2002) (0)
- Advisory Board (2017) (0)
- Advisory Board (2017) (0)
- Advisory Board (2017) (0)
- Time in quantum cosmology (2021) (0)
- The AdP Advisory Board (2012) (0)
- Covariant Approaches to Quantum Gravity (2007) (0)
- A ug 2 00 2 Quantum General Relativity and Hawking Radiation (2002) (0)
- On the dynamics of the general Bianchi IX spacetime near the singularity (2018) (0)
- Book review (1990) (0)
- Advisory Board (2013) (0)
- Space and Time 62 Years After the Berne Conference (2018) (0)
- The Einstein, Podolsky, and Rosen Paper (2021) (0)
- Advisory Board (2017) (0)
- The impact of Friedmann's work on cosmology (2021) (0)
- Group Report: are we Making Progress in Relating Cosmology and Fundamental Theories? (1997) (0)
- A Numerical Approach to Black Holes (1998) (0)
- Quantum gravity -- an unfinished revolution (2023) (0)
- Translation of Einstein’s 1948 Paper (2021) (0)
- Advisory Board (2017) (0)
- Wigner function and decoherence (1997) (0)
- Advisory Board (2014) (0)
- Advisory Board (2016) (0)
- Double standards in space-time as seen from “nowhen” (1996) (0)
- Book Review: Statistical Geometry and Applications to Microphysics and Cosmology. By Sisir Roy (2000) (0)
- THEORETICAL STUDY OF THE INTERACTION OF MESOSCOPIC QUANTUM SYSTEMS WITH GRAVITY (2004) (0)
- The Arguments of Time, Jeremy Butterfield (ed.). (2001) (0)
- Advisory Board (2016) (0)
- Introduction: The Relevance of Gravity for DICE (2004) (0)
- A comparison between classical semiclassical gravity and semiclassical electrodynamics (1991) (0)
- Hamiltonian evolution and quantization for extremal black holes (1999) (0)
- ov 2 00 2 Quantum General Relativity and Hawking Radiation (2002) (0)
- Quantum-gravitational corrections to the power spectrum for a closed universe (2023) (0)
- Pais: The Genius of Science. A Portrait Gallery of 20th Century Physicists/Pauli, Giulini: Relativitätstheorie/Jammer: Concepts of Mass in Contemporary Physics and Philosophy/Kümmel: Energie und Kreativität/Omnès: Understanding Quantum Mechanics/Stanley: Rüstungsmodernisierung durch Wissenschaftsmig (2000) (0)
- The Need for Quantum Cosmology (2011) (0)
- Parametrized and Relational Systems (2007) (0)
- Advisory Board (2013) (0)
- Further Developments (2021) (0)
- ARROW OF TIME FROM TIMELESS QUANTUM GRAVITY (2006) (0)
- Semiclassical Black Hole States and Entropy Typeset Using Revt E X (0)
- Quantum cosmology: expectations and results (2006) (0)
- Reception and Impact of the EPR Paper (2021) (0)
- PATH INTEGRALS IN QUANTUM GRAVITY: GENERAL CONCEPTS AND RECENT DEVELOPMENTS (2008) (0)
- Semiclassical approximation of the Wheeler–DeWitt equation: arbitrary orders and the question of unitarity (2018) (0)
- On the interaction of mesoscopic quantum systems with gravity (2005) (0)
- Ju n 20 03 Graviton oscillations in the two-brane world (2003) (0)
- Advisory Board (2013) (0)
- Quantum Gravity and the Interpretation of Quantum Theory (2007) (0)
- Developments in Astrophysics (2005) (0)
- CPT Theorem (2009) (0)
- Hamiltonian Formulation of General Relativity (2007) (0)
- Advisory Board (2016) (0)
- Advisory Board (2017) (0)
- Phenomenology, decoherence, and the arrow of time (2012) (0)
- [Weizsäcker's concept of time from the current viewpoint]. (2014) (0)
- Advisory Board (2014) (0)
- Quantization of Black Holes (2007) (0)
- D ec 2 00 8 Canonical quantum gravity and blackhole evaporation (2009) (0)
- Advisory Board (2015) (0)
- Time, Chance and Reduction: Quantum gravity and the arrow of time (2010) (0)
- Approaches to Quantum Gravity (2010) (0)
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What Schools Are Affiliated With Claus Kiefer?
Claus Kiefer is affiliated with the following schools:
